Mechanical anti-loosening structure of turnout fasteners

Abstract

The invention provides a mechanical anti-loosening structure of a turnout fastener, which includes an anti-rotation support and an anti-loosening piece. The rail waist and turnout component parts are fastened together, and the anti-rotation support is provided with slots symmetrically on the side facing away from the rail waist; the anti-loosening piece includes an engaging part that fits the outer surface of the nut and has an opening at the bottom , and an inserting part that matches with the slot, the inserting part is fixed on the engaging part; when it is in a fastened state, the engaging part is set over the nut from top to bottom and is in contact with the nut At the same time, the inserting part is inserted into the slot, and the bottom of the engaging part is fixed by a cotter pin. The anti-loosening effect of the present invention is strong, and the anti-rotation support does not need to be against the upper and lower slopes of the rail waist space, and the space required for the installation of the anti-loosening piece is small, so that the anti-loosening structure can be universally adapted to different rail types and bolt hole center heights, and is universal Strong.

Description

technical field [0001] The invention relates to the technical field of railway turnouts, in particular to a mechanical anti-loosening structure of turnout fasteners with good versatility. Background technique [0002] Railway turnouts are laid on flexible foundations such as ballast and rubber cushions. Under the action of dynamic loads when trains pass by, the overall structure of the turnout will vibrate greatly, which may cause the fasteners of the turnout to loosen or even fall off, endangering traffic safety. For this problem, it is easy to think of starting from the following three aspects: 1. Fastening with double nuts; 2. Preventing loosening by setting spring washers; 3. Loosening by restricting the rotation of bolts and nuts. The mechanical anti-loosening method of restricting the rotation of bolts and nuts is the most reliable of the three schemes. [0003] Therefore, the anti-loosening structure of existing turnout fasteners generally adopts the form of rail gas...

AI Technical Summary

Problems solved by technology

This anti-loosening structure has the following disadvantages: 1. In order to limit the rotation of the rail washer itself, the rail washer must be against the upper and lower slopes of the rail waist space, resulting in a large size of the rail washer; 2. Since the anti-rotation insert adopts a vertical structure , which requires a large installation space, so the thickness of the rail gasket usually needs to fill the space of the rail waist, and the installation position of the anti-rotation insert is placed outside the rail head, resulting in thicker rail gaskets, resulting in waste of materials and increased production costs; 3 There are many types of turnout rail parts. The rail type is divided into 60kg / m, 60AT, 60D40, 60TY, etc. The same rail type such as 60kg / m rail bolt hole center height is divided into 79mm, 89mm and other forms. The rail gasket and its matching The anti-rotation inserts need to be matched with various sizes of turnout rails, and the versatility is poor; 4. The rail gaskets and anti-rotation inserts are all castings, and the appearance is relatively rough

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